1.
harsh; unkind; cold-hearted (in treatment)
Treating someone in a cold, dismissive, or unkind manner. Describes behavior toward others rather than personality in general.
Usage
邪険 almost always appears in the pattern 邪険に + verb, functioning adverbially. It describes cold or dismissive treatment of a person.
邪険 focuses specifically on treatment of people, implying the speaker feels the harshness is unjustified or excessive. It is not used to describe objects or situations.